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- "use strict";
- var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault").default;
- Object.defineProperty(exports, "__esModule", {
- value: true
- });
- exports.default = subISOWeekYears;
- var _index = _interopRequireDefault(require("../addISOWeekYears/index.js"));
- var _index2 = _interopRequireDefault(require("../_lib/requiredArgs/index.js"));
- var _index3 = _interopRequireDefault(require("../_lib/toInteger/index.js"));
- /**
- * @name subISOWeekYears
- * @category ISO Week-Numbering Year Helpers
- * @summary Subtract the specified number of ISO week-numbering years from the given date.
- *
- * @description
- * Subtract the specified number of ISO week-numbering years from the given date.
- *
- * ISO week-numbering year: http://en.wikipedia.org/wiki/ISO_week_date
- *
- * @param {Date|Number} date - the date to be changed
- * @param {Number} amount - the amount of ISO week-numbering years to be subtracted. Positive decimals will be rounded using `Math.floor`, decimals less than zero will be rounded using `Math.ceil`.
- * @returns {Date} the new date with the ISO week-numbering years subtracted
- * @throws {TypeError} 2 arguments required
- *
- * @example
- * // Subtract 5 ISO week-numbering years from 1 September 2014:
- * const result = subISOWeekYears(new Date(2014, 8, 1), 5)
- * //=> Mon Aug 31 2009 00:00:00
- */
- function subISOWeekYears(dirtyDate, dirtyAmount) {
- (0, _index2.default)(2, arguments);
- var amount = (0, _index3.default)(dirtyAmount);
- return (0, _index.default)(dirtyDate, -amount);
- }
- module.exports = exports.default;
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